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E.A. von Regel, Gartenflora, vol. 16 : p. 0, t. 0, fig. 0 (1867) [46]
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Smithsonian Institute, Washington, D.C., U.S.A.
E.A. von Regel, Gartenflora, vol. 16 : p. 0, t. 0, fig. 0 (1867)